CE2746 Просмотр технического описания (PDF) - Unspecified

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CE2746

6-Channel Audio DAC, 24-bit, 192kHz

Unspecified 

CE2746

DIGITAL AUDIO SERIAL INTERFACE

The digital serial interface consists of 3 serial input pins, DIN1, DIN2, DIN3, and one serial clock input pin, BCK, and one

left/right indicator input pin, LRCK. The data are 2’s complement MSB first numbers. The CE2746 supports four resolution,

which are selected programming the control register CREG0[5:4] via the I2C serial control port. Table 1 describes these four

resolution.

Table (1): Audio Serial Data Input Resolution,

Format CREG0[5:4]

0

00

1

01

2

10

3

11

DIN[3:1]

24-bit (default)

20-bit

18-bit

16-bit

The DIN3, DIN2 and DIN1 can be either 24-bit or 32-bit per frame as well as left justified, right justified or I2S. The CE2746

counts the number of BCK per frame to determine whether the input is 24 or 32 bits format.

Table (2): Audio Serial Data Input Modes

Mode

0

1

2

3

CREG0[7:6]

DIN[3:1]

00

Right Justified

01

I2S

10

Left Justified (default)

11

Invalid

6-18

March 24, 2004

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